发动机悬置软垫强度分析  

STRENGTH ANALYSIS OF ENGINE SUSPENDING BEARINGS

作　　者：戴永谦[1] 宋希庚[1] 郭荣春[2] 丁锋[1] 

机构地区：[1]大连理工大学动力工程系,大连116024 [2]山东交通学院汽车工程系,济南250023

出　　处：《机械强度》2006年第4期603-606,共4页Journal of Mechanical Strength

摘　　要：建立发动机悬置的有限元分析模型,考虑橡胶块与钢板之间的接触和橡胶材料的超弹性特性。计算得到结构应力强度分布规律,据此确定的结构疲劳源,与实际疲劳裂纹初始发生位置相符,进而判断结构的断裂面。对结构交变应力强度的计算进一步确定结构疲劳失效发生的位置。计算结果为将三维结构简化为二维结构进行断裂计算提供依据。The finite element model for engine suspending bearings was established, considering the contact condition between the rubber and steel, contact pairs that satisfy manufacture requirements（ there must be rubber adheres to the steel） were established, The loads that the beatings endured during operation were analyzed. Since the deformation of rubber material is incompressible and nonuniform, the material property of rubber was assumed to be hyperelastic, isotropic and isothermal. The original fatigue position of the structure was determined from the contours of stress intensity calculated by finite element program, which accords with the actual initial fatigue crack position. The ultimate fracture surface was also proposed. The calculated altemating stress intensity of the structure confirmed the fatigue failure position uheriorly. The regular distribution of stress intensity provides a basis for simplifying this three dimensional structure into two dimensional structure to perform fracture calculation, so that the calculation scale can be reduced significantly.

关 键 词：发动机 悬置软垫 有限元法 超弹性 交变应力强度 断裂 

分 类 号：U464.13[机械工程—车辆工程] TB324[交通运输工程—载运工具运用工程]